The pitch of a sound stimulus is related to the physical ...

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The pitch of a sound stimulus is related to the physical characteristic of
 
  A) the amplitude of the vibration.
  B) the distance between the sound source and the detector.
  C) the complexity of the sound waves.
  D) frequency of vibration.
  E) air temperature.

Question 2

Humans can detect sound vibrations between ________ and ________ cycles per second.
 
  A) 30; 700
  B) 25; 4,000
  C) 30; 20,000
  D) 25; 9,000
  E) 300; 45,000

[katara]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: C

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